{"id":"CVE-2026-118176","revision":null,"records":[{"revision":"d0a6c6bf8c4242a8a48a89ccf948ab0e","observedAt":"2026-10-27T19:45:55.783+00:00","statement":{"source":"cve-program","id":"CVE-2026-118176","aliases":[],"title":"Bypass of remote UNC path restriction in mailbox: URLs","description":"Thunderbird's check that prevents mailbox: URLs from accessing files on remote Windows network shares could be bypassed using extended-length UNC paths. Displaying a specially crafted email could cause Thunderbird to connect to an SMB server chosen by the attacker, disclosing the user's Windows account name and NTLM authentication data, which could be used for offline password cracking or relay attacks.\nThis bug only affects Thunderbird on Windows. Other operating systems are unaffected. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.","state":0,"publishedAt":"2026-10-27T18:16:30.272+00:00","modifiedAt":"2026-10-27T18:27:48.875+00:00","affected":[{"ecosystem":"Vendor product","name":"Thunderbird","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Thunderbird\",\n                    \"vendor\": \"Mozilla\",\n                    \"versions\": [\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"153.6\",\n                            \"lessThanOrEqual\": \"153.*\",\n                            \"versionType\": \"rpm\"\n                        },\n                        {\n                            \"status\": \"unaffected\",\n                            \"version\": \"159\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"versionType\": \"rpm\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2081141","https://www.mozilla.org/security/advisories/mfsa2026-121/","https://www.mozilla.org/security/advisories/mfsa2026-122/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118176","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118176","identifiers":["CVE-2026-118176"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-10-30T20:45:27.3144370+00:00","complete":true,"records":1094,"lastAttemptAt":"2026-10-30T20:45:27.314437+00:00","lastSuccessAt":"2026-10-30T20:45:27.4657801+00:00","error":null,"lastVerifiedAt":"2026-10-30T20:45:27.4657803+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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